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Subject: |
git vc-annotate fails in detached HEAD state |
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Date: |
Fri, 24 May 2013 15:07:37 +0200 |
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User-agent: |
Wanderlust/2.15.9 (Almost Unreal) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (Gojō) APEL/10.8 Emacs/24.3.50 (i386-mingw-nt6.1.7601) MULE/6.0 (HANACHIRUSATO) |
Hi.
1. I open a git versioned file with vc-git enabled in a directory
currently in detached HEAD state (e.g. after checking out a tag)
2. notice the mode line says "Git:!"
Now, when I do
C-x v g (vc-annotate)
The annotation buffer will be displayed, only saying
,----
| fatal: bad revision ''
`----
Apparently, vc-git-working-revision calls "git symbolic-ref HEAD",
which - in this case - gives:
$ git symbolic-ref HEAD
fatal: ref HEAD is not a symbolic ref
So, vc-git-working-revision returns an empty string as the current
"revision" vc-mode refers to.
M-: (vc-git-working-revision (buffer-file-name))
-> ""
When calling vc-annotate, the vc-git-annotate-command gets called with
the empty string for the rev parameter leading to the error.
This patch fixes it for me:
----------------- 8< --------------------- 8< -------------
diff --git a/lisp/vc/vc-git.el b/lisp/vc/vc-git.el
index 06474cb..63a7115 100644
--- a/lisp/vc/vc-git.el
+++ b/lisp/vc/vc-git.el
@@ -885,7 +885,7 @@ or BRANCH^ (where \"^\" can be repeated)."
(defun vc-git-annotate-command (file buf &optional rev)
(let ((name (file-relative-name file)))
- (vc-git-command buf 'async nil "blame" "--date=iso" "-C" "-C" rev "--"
name)))
+ (vc-git-command buf 'async nil "blame" "--date=iso" "-C" "-C" (if (>
(length rev) 0) rev) "--" name)))
(declare-function vc-annotate-convert-time "vc-annotate" (time))
--
Claudio
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--- Begin Message ---
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Subject: |
Re: bug#14459: git vc-annotate fails in detached HEAD state |
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Date: |
Tue, 28 May 2013 03:14:04 +0400 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (windows-nt) |
Version: 24.4
Claudio Bley <address@hidden> writes:
> Yes, this is way better than what I've come up with. But shouldn't we
> also use the "--short[=n]" option to restrict the length of the
> revision string as it is displayed in the modeline? I think 40 chars
> is a bit long a text taking up precious space in my modeline.
Thanks, I missed that. And also the fact that
`vc-git-mode-line-string' relied on the non-standard return value (empty
string) to determine whether it should add the appropriate help-echo,
("No current branch (detached HEAD)").
I've checked in a more comprehensive patch, using the same help-echo
format in both cases.
Stefan Monnier <address@hidden> writes:
> The shortening could also be limited to the modeline.
Done. Shortening the mode-line format in `vc-git-mode-line-string'
wasn't an obvious solution for me, but it seems to work well enough.
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